Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 05, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Registrant Name Checkpoint Therapeutics, Inc.  
Entity Central Index Key 0001651407  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Small Business true  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   30,995,555
Common Class A [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   7,000,000